20 mm Lens Club.

tim60 · 01-04-2017, 06:15 AM

There might be something in that. I have found that, particularly, my K100DS was very affected by the golden hour light, to the extent I found it ugly, yellowish cast, whereas I do not recall such an effect from either my eye at the time or when I used film at that time of day. My K3 is less yellowish.

**bpv_UW** · 01-04-2017, 11:17 PM - **2 Likes**

Pre-sunrise on Slate River, near Crested Butte, CO, July 2016. x-post to K-1 pics thread

-Brandon

**bpv_UW** · 01-10-2017, 11:44 PM - **5 Likes**

Slate River near Crested Butte, CO, July 2016. K-1 and Fa 20. 3 images blended for dynamic range, a 4th for foreground rock focus. x-post to K-1 pics thread.

-Brandon

**todd** · 01-13-2017, 01:13 PM - **4 Likes**

Originally posted by bpv_UW

Slate River

beautiful image!

Quick stop in San Diego a few nights ago... FA20/K1

**bpv_UW** · 01-14-2017, 11:05 PM - **4 Likes**

Originally posted by todd

beautiful image!

Thanks!

Here's another, this time from a bit further south in the CO Rockies.

Red Mountain reflected in Crystal Lake at dawn, just outside of Ouray, CO, July 2016. K-1 and Fa 20, single exposure. xpost to K-1 pics thread

-Brandon

**RobA_Oz** · 01-15-2017, 04:28 AM - **2 Likes**

I'm finding this lens works best with the K-1, stopped down to f11 or f16.

**bpv_UW** · 01-15-2017, 07:29 PM

Originally posted by RobA_Oz

I'm finding this lens works best with the K-1, stopped down to f11 or f16.

f/11 is the ticket for me. It's a touch sharper at f/8 (distinguishable if you zoom into 100%, but not by much), but DOF better at f/11. I find that aperture the best compromise between the two. On my copy, f/16 suffers a bit due to distraction.

-Brandon

**Andrew_Oid** · 01-15-2017, 07:47 PM

Originally posted by bpv_UW

f/11 is the ticket for me. It's a touch sharper at f/8 (distinguishable if you zoom into 100%, but not by much), but DOF better at f/11. I find that aperture the best compromise between the two. On my copy, f/16 suffers a bit due to distraction.

-Brandon

Did you try the half-stop between f8 and f11?

**RobA_Oz** · 01-15-2017, 08:59 PM

Originally posted by bpv_UW

f/11 is the ticket for me. It's a touch sharper at f/8 (distinguishable if you zoom into 100%, but not by much), but DOF better at f/11. I find that aperture the best compromise between the two. On my copy, f/16 suffers a bit due to distraction.

-Brandon

It depends on the subject. The FA20 is sharp in the centre at most apertures. While I didn't notice much of an issue on the APS-C sensor (in spite of what some others have said, which was probably due to some sample variation) the K-1 tests the edges much more on mine. Stopping down improves the resolution at the edges, which is why I've used f16 for the posted photo, even though diffraction effects are probably starting to show. If your main subject is central, just about anything will do. I do wonder if the problem with the edges is curvature of field.

**bpv_UW** · 01-15-2017, 09:02 PM

Originally posted by Andrew_Oid

Did you try the half-stop between f8 and f11?

I did. Maybe a touch sharper than f/11 at 100% if you squint - but I prefer the little bit of added DOF that f/11 gives for most comps. For absolute top IQ (with my copy), I'd shoot at f/8 and just focus stack however many images I needed to in order to get everything tack sharp (2 would usually do it, occasionally 3 depending on the composition). But f/11 allows me to pull off lots of images without focus stacking, and without sacrificing much IQ.

Brandon

---------- Post added 01-15-17 at 10:05 PM ----------

Originally posted by RobA_Oz

I do wonder if the problem with the edges is curvature of field.

I think that's right on. My copy, at least, has a good bit of field curvature (not quite as bad as the Da 15 on K-3, but not a lot better). In practice, this means that I can't move focus that much off infinity stop before the edges of the background start to get a little muddy - so if I want to avoid that I find myself focus stacking more than I would with a lens with lesser field curvature. But given the size, weight, and overall rendering offered by the Fa 20, those are small sacrifices to make IMO.

-Brandon

**jlsa05** · 01-16-2017, 03:21 AM - **4 Likes**

This is done using Pentax M 20mm f4 on a Fuji X-M1

**bpv_UW** · 01-24-2017, 12:10 AM - **2 Likes**

Sun dips behind the mountains, just outside Telluride, CO, July 2016. Fa 20, single exposure. xpost to K1 pics thread.

-Brandon

**Andrew_Oid** · 01-24-2017, 01:50 AM

Originally posted by bpv_UW

Sun dips behind the mountains, just outside Telluride, CO, July 2016. Fa 20, single exposure. xpost to K1 pics thread.

-Brandon

Lovely light and colors. Good perspective and sharpness, too.

**bpv_UW** · 01-24-2017, 06:33 PM

Originally posted by Andrew_Oid

Lovely light and colors. Good perspective and sharpness, too.

Thank you.
Brandon

noelpolar · 01-26-2017, 06:22 PM - **6 Likes**

20mm Voigtlander 3.5 (just call me the Dragonfly Whisperer)

01-15-2017, 04:28 AM - 2 Likes	#396
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,197	Sullivan's Cove with the K-1 and FA20/2.8 I'm finding this lens works best with the K-1, stopped down to f11 or f16.

01-24-2017, 01:50 AM	#403
Andrew_Oid Site Supporter Join Date: Sep 2013 Location: Cuenca Photos: Gallery \| Albums Posts: 646	Nice photo Originally posted by bpv_UW Sun dips behind the mountains, just outside Telluride, CO, July 2016. Fa 20, single exposure. xpost to K1 pics thread. -Brandon Lovely light and colors. Good perspective and sharpness, too.

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01-04-2017, 06:15 AM	#391
tim60 Pentaxian Join Date: Apr 2011 Photos: Albums Posts: 8,748	There might be something in that. I have found that, particularly, my K100DS was very affected by the golden hour light, to the extent I found it ugly, yellowish cast, whereas I do not recall such an effect from either my eye at the time or when I used film at that time of day. My K3 is less yellowish.

01-04-2017, 11:17 PM - 2 Likes	#392
bpv_UW Site Supporter Join Date: Jan 2009 Location: Rochester, MN Posts: 765	Pre-sunrise on Slate River, near Crested Butte, CO, July 2016. x-post to K-1 pics thread -Brandon

01-10-2017, 11:44 PM - 5 Likes	#393
bpv_UW Site Supporter Join Date: Jan 2009 Location: Rochester, MN Posts: 765	Slate River near Crested Butte, CO, July 2016. K-1 and Fa 20. 3 images blended for dynamic range, a 4th for foreground rock focus. x-post to K-1 pics thread. -Brandon

01-13-2017, 01:13 PM - 4 Likes	#394
todd Site Supporter Join Date: Jul 2008 Location: Arizona Photos: Gallery Posts: 6,794	Originally posted by bpv_UW Slate River beautiful image! Quick stop in San Diego a few nights ago... FA20/K1

01-14-2017, 11:05 PM - 4 Likes	#395
bpv_UW Site Supporter Join Date: Jan 2009 Location: Rochester, MN Posts: 765	Originally posted by todd beautiful image! Thanks! Here's another, this time from a bit further south in the CO Rockies. Red Mountain reflected in Crystal Lake at dawn, just outside of Ouray, CO, July 2016. K-1 and Fa 20, single exposure. xpost to K-1 pics thread -Brandon

01-15-2017, 07:29 PM	#397
bpv_UW Site Supporter Join Date: Jan 2009 Location: Rochester, MN Posts: 765	Originally posted by RobA_Oz I'm finding this lens works best with the K-1, stopped down to f11 or f16. f/11 is the ticket for me. It's a touch sharper at f/8 (distinguishable if you zoom into 100%, but not by much), but DOF better at f/11. I find that aperture the best compromise between the two. On my copy, f/16 suffers a bit due to distraction. -Brandon

01-15-2017, 07:47 PM	#398
Andrew_Oid Site Supporter Join Date: Sep 2013 Location: Cuenca Photos: Gallery \| Albums Posts: 646	Originally posted by bpv_UW f/11 is the ticket for me. It's a touch sharper at f/8 (distinguishable if you zoom into 100%, but not by much), but DOF better at f/11. I find that aperture the best compromise between the two. On my copy, f/16 suffers a bit due to distraction. -Brandon Did you try the half-stop between f8 and f11?

01-15-2017, 08:59 PM	#399
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,197	Originally posted by bpv_UW f/11 is the ticket for me. It's a touch sharper at f/8 (distinguishable if you zoom into 100%, but not by much), but DOF better at f/11. I find that aperture the best compromise between the two. On my copy, f/16 suffers a bit due to distraction. -Brandon It depends on the subject. The FA20 is sharp in the centre at most apertures. While I didn't notice much of an issue on the APS-C sensor (in spite of what some others have said, which was probably due to some sample variation) the K-1 tests the edges much more on mine. Stopping down improves the resolution at the edges, which is why I've used f16 for the posted photo, even though diffraction effects are probably starting to show. If your main subject is central, just about anything will do. I do wonder if the problem with the edges is curvature of field.

01-15-2017, 09:02 PM	#400
bpv_UW Site Supporter Join Date: Jan 2009 Location: Rochester, MN Posts: 765	Originally posted by Andrew_Oid Did you try the half-stop between f8 and f11? I did. Maybe a touch sharper than f/11 at 100% if you squint - but I prefer the little bit of added DOF that f/11 gives for most comps. For absolute top IQ (with my copy), I'd shoot at f/8 and just focus stack however many images I needed to in order to get everything tack sharp (2 would usually do it, occasionally 3 depending on the composition). But f/11 allows me to pull off lots of images without focus stacking, and without sacrificing much IQ. Brandon ---------- Post added 01-15-17 at 10:05 PM ---------- Originally posted by RobA_Oz I do wonder if the problem with the edges is curvature of field. I think that's right on. My copy, at least, has a good bit of field curvature (not quite as bad as the Da 15 on K-3, but not a lot better). In practice, this means that I can't move focus that much off infinity stop before the edges of the background start to get a little muddy - so if I want to avoid that I find myself focus stacking more than I would with a lens with lesser field curvature. But given the size, weight, and overall rendering offered by the Fa 20, those are small sacrifices to make IMO. -Brandon

01-24-2017, 12:10 AM - 2 Likes	#402
bpv_UW Site Supporter Join Date: Jan 2009 Location: Rochester, MN Posts: 765	Sun dips behind the mountains, just outside Telluride, CO, July 2016. Fa 20, single exposure. xpost to K1 pics thread. -Brandon

01-24-2017, 06:33 PM	#404
bpv_UW Site Supporter Join Date: Jan 2009 Location: Rochester, MN Posts: 765	Originally posted by Andrew_Oid Lovely light and colors. Good perspective and sharpness, too. Thank you. Brandon

01-26-2017, 06:22 PM - 6 Likes	#405
noelpolar Veteran Member Join Date: Oct 2013 Location: Goolwa, SA Photos: Gallery Posts: 4,310	20mm Voigtlander 3.5 (just call me the Dragonfly Whisperer)